Cells that have only half of that number are called

The principle of conversation of matter that in closed system the total amount of matter?

In which scenario would mitosis be least desirable in terms of a species' survival? 1. A species has little energy to devote to reproduction 2. A species is unable to travel far to find a mate 3.

A scientist was born in 1995 and died in 1975. How is this possible?

The hypothalamus controls the anterior pituitary by means of: a. releasing hormones b. second messengers c. third messengers d. antibodies e. cytokines.

The endosymbiotic theory provides an explanation for the origin of chloroplasts. Which trait of chloroplasts supports this explanation?

Which drugs appear to produce therapeutic effects by occupying the receptor sites for dopamine and blocking its activity?

What is the origin of flowering plants?

A single-gene trait that has two alleles and that shows a simple dominant-recessive pattern will result in

In what way do investigations build scientific knowledge? The results of investigations lead to questions that cannot be tested. They reflect the opinions and social values of scientists, ensuring valid information.

How do chemosynthetic bacteria get energy? A. They convert carbon dioxide or methane into food without light. B. They carry out photosynthesis. C. They carry out digestion. D. They convert carbon dioxide and sunlight into sugar.